The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2004
Filed:
Jun. 04, 2003
Applicant:
Inventors:
Shye Shapira, Allentown, PA (US);
Debra Johnson, Fleetwood, PA (US);
Shahriar Moinian, Murray Hill, NJ (US);
Assignee:
Agere Systems Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/120 ;
U.S. Cl.
CPC ...
H01L 2/120 ;
Abstract
The present invention provides an varactor, a method of manufacture thereof. In an exemplary embodiment, the varactor includes a semiconductor substrate and well of a first and second conductivity type, respectively. A conductive region in the well has a same conductivity type as the well but a lower resistivity than the well. At least a portion of the well is between at least two sides of the conductive region and an area delineated by an outer perimeter of a conductive layer over the well. Such varactors have a lower series resistance and therefore have an increased quality factor.